Oil-forge for drill-steel.



W. W. CASE, JR.

OIL FORGE FOR DRILL STEEL.

APPLICATION FILED MAY 1, 1913.

1,077,803, Patented Nov. 4, 1913.

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APPLICATION FILED MAY 1, 1913.

Patented Nov. 4, 1913.

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UNITED STATES PATENT OFFICE.

WILLIS w. CASE, .13., or DENVER, conoaano.

OIL-FORGE FOR DRILL-STEEL.

To all whom it may concern .Be it known that I, WILL s W. Qasn, J r., a citizen of the United States, residing in the city andcounty of Denver and State of Colorado, have invented certain new and useful Improvements in Oil-Forges 'for Drill-Steel; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. This invention relates to improvements in forges, and more particularly to an improved oil forge for drill steel.

\Vhen the old coal or coke forges, the coal or coke invariably contains considerable sulfur, causing the drill steel to become sulfurized, whereby the steel tends to chip very easily, rendering the same ineffective after short usage. jection to oil forges heretofore constructed is the noise and smoke created, and one of the objects of the present invention is to provide a forge which has all of the advantages of an oil forge over a coal or coke forge, and, at the same time, eliminates the objectionable features of noise and smoke.

With this and other objects in view, the invention consists of the novel features of construction and in the combination and arrangement of parts, as will be more fully described in the following specification and pointed out more particularly in the appended claims.

\Vhile the invention is not restricted to the exact details shown and described, still, for the purpose of more clearly understand,- ing the same, reference is had to. the accompanying drawings, illustrating a practical embodiment of the invention, in which drawings like characters designate the same parts in the several views, and in which:

Figure 1 is a central sectional plan view through the combustion chamber of the forge, taken on a plane along the line 1-1 2, the burner and outside connections therefor being shown in plan; Fig. 2

is a view in elevat on, looking toward the rear 9f the forge Fig. 3 is a central vertical sectional view, taken on a plane transversely of the forge; and Fig. 4: is a view in end elevation.

The forge proper may be supported in any suitable way, but, in the drawings, this has been illustrated by a pair of semi-cylindrical metal supports 1 in the form of hol- Specification of Letters Patent.

Application filed May 1, 1913. Serial No. 764,911.

Another principal ob-' Pa nted Nov. 4, 1913.

low base plates, forming a space 2 therebetween for substantially housing the fan and motor hereinafter referred to. These base members are suitably flanged at their bottom and side edges, indicated at 3, and at their upper edge i. These base members are spaced apart, as shown,-and on top of same is mounted an iron sectional casing 5 and 6, forming the rear and front sheathing or jacket for the lining of the combustion chamber of the forge. The front'and rear casing members 5 and 6 are also provided with the inwardly-disposed bottom sections 7 (Fig. 3), forming a support for the lining of the combustion chamber, and they are also provided with upper and lower external flanges 8 and 9, the former being adapted to seat on the flanges 4 of the base supports and secured thereto by means of bolts 10. This sectional casing 5-6 is of oval shape, as seen more clearly in Fig. 1, and contains a fire pot formed of the best fire clay, which is preferably molded in two longitudinal sections having its exterior side wall of oval contour, adapted to be snugly jacketed by the casing 5'6.

The interior wall of the fire pot or combustion chamber is of peculiar conformation. The bottom 11 is bowl-shaped, the vertical wall curving upwardly, as shown more clearly in Fig. 3. The front and rear sections 12 and 13, of the fire pot are provided centrally on their inner surfaces with opposed projections, which are of pyramidal form, the projection 14' on the front plate being intact, while the projection 15 "on the rear plate is truncated, and the rear wall 13 is provided with a bore 16, passing through the truncated projection 15 and adapted to receive the nozzle 17 of the oil burner 18. The pyramidal projection 14, being directly opposite and in alinement with the burner opening 16, acts as a deflecting wall or battle against which the flame impinges, diverting the same in a swirling fashion around the combustion chamber, as will be hereinafter more fully referred to. As before stated, the combustion chamber of the fire pot is preferably built up of the best fire clay in two longitudinal sections, but these do not extend to the top of the casing 5-6, but only to a position substantially above the pyramidal projections or bafiies 1i and 15. Mounted on top of these sections '12 and 13 are located sectional top members 19 of fire clay, which members are of oval contour eXteriorly, registering with the outer sur-. face of the sections 12 and 13, and the interior faces of these top members 19 are curved upwardly and inwardly forming a continuation of the upper curved surfaces 14* and 15 of the pyramidal projections, the lower faces of these pyramidal projections also being of curved contour, merging into the lower or bowl-shaped surface of the bottom of the fire pot. It will be seen that the curvature of the upper members 19 forms an overhanging ledge or shoulder 21 extending like a rim around the top of the fire pot, tending to deflect and swirl the flames and products of combustion inwardly and downwardly, as will be more fully referred to.

22 designates the walls of thefire clay cover formed in sections and connected by a beveled key block 24 of fire clay extending transversely above the fire pot, as indicated by dotted lines in Fig. 2, the cover being also provided with a lateral passage abovethe fire pot and below the key block 24, extending transversely across the forge and having a rear opening 25 and a front opening 26, providing means for inserting the work within the forge in contact with the flames, and which openings allow the work to be under observance at all times, an ad vantage over coal or coke forges, where the operative is obliged to work in the blind, sometimes causing considerable loss of steel by burning. The cover walls 22 are also provided with an iron jacket or casing, formed of two longitudinal sections 27, having vertical top flanges 28, vertical end flanges 29, and horizontal base flanges 30, the latter adapted to seat on the flanges 8 of the fire pot casing. and the adjacent flanges of each section being adapted to be bolted together, as indicated by the bolts 31. Similarly, the fire pot casing is provided with vertical end flanges 32, bolted together by the bolts 33.

It will be seen from Figs. 2 and 3 that the jacket or sheathing for the cover is cut away to register, with the openings 25 and 26 of the transverse passageway.

18 designates conventionally a low pressure oil burner of the type corresponding in detail to that illustrated in the W. NV. Case United States Patent #1,008,873, of September 1t), 1911, which burner is provided with a nozzle 17 passing through the bore 16, and afuel supply pipe 35, leading from a suitable reservoir, not illustrated. An air supply pipe 36 also leads to the burner and communicates with a fan blower 37 directly connected to and driven by an electric motor 38-, or connected thereto by a belt or chain connection, the fan blower 37 being adapted to deliver to the burner the air necessary to atomize the oil at a constant ressure of about six ounces. For convenience of location, the fan blower and motor are preferably mounted within the space 2 formed between the base supports 1, the motor in the drawings being shown as supported on a pedestal 38 This use of a low pressure oil burner with a low pressure fan blower not only saves expense in construction and operation, but also avoids the objectionable roar of high pressure burner having positive blowers requiring several horse power to operate them.

In the air pipe line 36, between the fan blower and the burner, there is provided an elbow or connection 39 in which are thrcad-' ed laterally disposed pipes 40 lying substantially parallel and adjacent to the rear sheathing 5, which pipes are capped at their ends, as at 41, and are provided on their top surfaces with a longitudinal series of orifices 42, adapted ,to deliver jets of air upwardly to protect the operative, regulating the burner, from excessive heat. from the opening 25. Also, at the top of the forge is arranged a pair of angle bars or brackets 43 to which is secured a vertically disposed plate or shield 44 by means of bolts 45, which also protects the eyes of an operative at the rear of the forge from any blast of flame or intense heat emerging from the opening 25.

It will be understood that the pyramidal projections or bathing means 14 may be of larger dimensions than shown and the side walls 14 are preferably curved, forming concave surfaces the same as the upper and lower faces 14, the same being true with referenceto the projections 15.

It is believed that the operation will be obvious from the foregoing description, but may be briefly referred to as follows: By regulating the delivery of air and oil to the burner 18, the oil is minutely atomized and commingled with the air from the low pressure fan blower, so that complete com bustion takes place within the combustion chamber, eliminating the disagreeable smoke and the forming of carbon in the forge, a highly objectionable feature in oil forges. The flame from the nozzle 17 is directed against the baffle or projection 14, and, owing to the pyramidal shape of the baflle projection, the hot flames and gases are split up and caused to diverge downwardly, upwardly and laterally in a swirling fashion and the flames and hot gases, diverted to the opposite side of the combustion chamber, are similarly caused to swirl around by the deflecting surfaces of the pyramidal projection 15, and finally swirling upwardly are again deflected inwardly and downwardly by the curved surfaces 20 and the overhanging lip 21, so that the heat in the flame chamber of the forge is greatly intensified.

The drill steel is inserted in the forge through the opening 26 above the flame chamber, and, while being heated, may be watched by the operative, as contradistinguished to the operation of embedding the end of the drill steel into a burning mass of coal or coke.

Having thus described my invention, what I claim is: I

1. In an oil forge, the combination of a fire pot, having a bowl shaped bottom, curving upwardly and merging into oppositely disposed projections forming means for baffling and causing the flame and heated gases to swirl around within said fire pot, one of said projections having a flame opening therethrough; and a fuel burner discharging through said flame opening into contact with the bafliing projection opposite thereto, substantially as described.

2. In an oil forge, the combination of a fire pot forming a flame chamber and having an internal wall curving upwardly and inwardly at its upper edge. providing an inwardly overhanging ledge extending around the top of said flame chamber; a baffling projection formed on one side face of said chamber; and a fuel burner on the opposite side of said chamber and discharging against said bafliing projection, substantially as described.

3. In an oil forge, the combination of a fire pot forming a flame chamber and having a bowl shaped bottom portion, and an upwardly and inwardly curved upper portion forming an internal'deflectin ledge extending around the top of said ame chamber; a pair of oppositely disposed baffling members project-inginwardly and forming substantially pyramidal cont-inuations of the central portion of said chamber afuel burner discharging, through a flame opening extending through one of said baflling members, against said opposed bafliing member; and a top' for said forge, an opening being provided between said top and said flame chamu her, for insertin the work to be forged, substantially as escribed.

In testimony whereof, I afiix my signature, in presence of two witnesses.

WILLIS W. CASE, JR.

Witnesses:

EDW. S. STEWART, J. S. GIUS'IA. 

